899949 has 4 divisors (see below), whose sum is σ = 1199936. Its totient is φ = 599964.

The previous prime is 899939. The next prime is 899971. The reversal of 899949 is 949998.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 899949 - 2⁵ = 899917 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a zygodrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 899898 and 899907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149989 + ... + 149994.

It is an arithmetic number, because the mean of its divisors is an integer number (299984).

2⁸⁹⁹⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

899949 is a deficient number, since it is larger than the sum of its proper divisors (299987).

899949 is a wasteful number, since it uses less digits than its factorization.

899949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299986.

The product of its digits is 209952, while the sum is 48.

The square root of 899949 is about 948.6564183096. The cubic root of 899949 is about 96.5471147239.

The spelling of 899949 in words is "eight hundred ninety-nine thousand, nine hundred forty-nine".